Why don't you use UploadFile
of WebClient over https if you want it to be secure? and that will automatically take care of adding multipart/form-data
.
Example using UploadFile
http://msdn.microsoft.com/en-us/library/36s52zhs.aspx
And one more thing, encoding and encrypting are 2 different things.
Edit:
You should probably tag your question as Silverlight if you you are using WebClient in your WebClient project. Anyways, WebClient class in SL doesn't have any UploadData method. See this for more info:
http://msdn.microsoft.com/en-us/library/system.net.webclient%28v=vs.95%29.aspx
Anyways, here is the working solution to your problem:
In your button click, have this code:
OpenFileDialog dialog = new OpenFileDialog();
bool? retVal = dialog.ShowDialog();
if (retVal.HasValue && retVal == true)
{
using (Stream stream = dialog.File.OpenRead())
{
MemoryStream memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
WebClient webClient = new WebClient();
webClient.Headers["Content-type"] = "multipart/form-data; boundary=---------------------------" + _boundaryNo;
webClient.OpenWriteAsync(new Uri("http://localhost:1463/Home/File", UriKind.Absolute), "POST", new { Stream = memoryStream, FileName = dialog.File.Name });
webClient.OpenWriteCompleted += new OpenWriteCompletedEventHandler(webClient_OpenWriteCompleted);
}
}
and the event itself:
void webClient_OpenWriteCompleted(object sender, OpenWriteCompletedEventArgs e)
{
if (e.Error == null)
{
Stream responseStream = e.Result as Stream;
dynamic obj = e.UserState;
MemoryStream memoryStream = obj.Stream as MemoryStream;
string fileName = obj.FileName;
if (responseStream != null && memoryStream != null)
{
string headerTemplate = string.Format("-----------------------------{0}
", _boundaryNo);
memoryStream.Position = 0;
byte[] byteArr = memoryStream.ToArray();
string data = headerTemplate + string.Format("Content-Disposition: form-data; name="pic"; filename="{0}"
Content-Type: application/octet-stream
", fileName);
byte[] header = Encoding.UTF8.GetBytes(data);
responseStream.Write(header, 0, header.Length);
responseStream.Write(byteArr, 0, byteArr.Length);
header = Encoding.UTF8.GetBytes("
");
responseStream.Write(byteArr, 0, byteArr.Length);
byte[] trailer = System.Text.Encoding.UTF8.GetBytes(string.Format("-----------------------------{0}--
", _boundaryNo));
responseStream.Write(trailer, 0, trailer.Length);
}
memoryStream.Close();
responseStream.Close();
}
}
where _boundaryNo is private string _boundaryNo = DateTime.Now.Ticks.ToString("x");
I had it working with Asp.Net MVC 4 and Silverlight 5.
Good luck :)
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